Isobar channels and nucleon resonances in {pi}{sup +{pi}-} electroproduction on protons

Journal Article · Tue Jul 15 00:00:00 EDT 2008 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778808070272· OSTI ID:21402530

Burkert, V D ^[1]; Golovach, E N ^[2]; Elouadrhiri, L ^[1]; Isupov, E L; Ishkhanov, B S ^[2]; Mokeev, V I ^[1]; Shvedunov, N V ^[2]

---

1. Thomas Jefferson National Accelerator Facility (United States)
2. Moscow State University (Russian Federation)

Acomprehensive set of differential cross sections for the reaction {gamma}{sub {nu}p} {sup {yields} {pi}-{pi}+}p at the square of the photon 4-momentum in the range 0.2 < Q{sup 2} < 0.6 GeV{sup 2} and the invariant mass of final-state hadrons in the range 1.3 < W < 1.6 GeV was first obtained with the CLAS detector at the Thomas Jefferson Laboratory. An analysis of these data on the basis of the phenomenological model developed by physicists from the Institute of Nuclear Physics at Moscow State University (INP MSU) and Thomas Jefferson Laboratory (INP MSU-Hall B at Jefferson Lab Collaboration) made it possible to determine, for the first time, the contributions of all isobar channels to the differential cross sections in question. The possibility of extracting the Q{sup 2} dependences of the electromagnetic form factors for the P{sub 11}(1440) and D{sub 13}(1520) resonances in a kinematical region that is the most sensitive to the contribution of the meson-baryon cloud to the structure of nucleon resonances is demonstrated.

• OSTI ID: 21402530
• Journal Information: Physics of Atomic Nuclei, Vol. 71, Issue 7; Other Information: DOI: 10.1134/S1063778808070272; Copyright (c) 2008 Pleiades Publishing, Ltd.; ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CEBAF ACCELERATOR
DIFFERENTIAL CROSS SECTIONS
ELECTROMAGNETIC FORM FACTORS
ELECTROPRODUCTION
FINAL-STATE INTERACTIONS
GEV RANGE
HADRONS
PHOTONS
PIONS MINUS
PIONS PLUS
PROTONS
RESONANCE
ACCELERATORS
BARYONS
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DIMENSIONLESS NUMBERS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FORM FACTORS
INTERACTIONS
LINEAR ACCELERATORS
MASSLESS PARTICLES
MESONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS